drivers/staging/speakup/speakup_apollo.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * originally written by: Kirk Reiser <kirk@braille.uwo.ca>
   4  * this version considerably modified by David Borowski, david575@rogers.com
   5  *
   6  * Copyright (C) 1998-99  Kirk Reiser.
   7  * Copyright (C) 2003 David Borowski.
   8  *
   9  * this code is specificly written as a driver for the speakup screenreview
  10  * package and is not a general device driver.
  11  */
  12 #include <linux/jiffies.h>
  13 #include <linux/sched.h>
  14 #include <linux/timer.h>
  15 #include <linux/kthread.h>
  16 #include <linux/serial_reg.h>   /* for UART_MCR* constants */
  17
  18 #include "spk_priv.h"
  19 #include "speakup.h"
  20
  21 #define DRV_VERSION "2.21"
  22 #define SYNTH_CLEAR 0x18
  23 #define PROCSPEECH '\r'
  24
  25 static void do_catch_up(struct spk_synth *synth);
  26
  27 static struct var_t vars[] = {
  28         { CAPS_START, .u.s = {"cap, " } },
  29         { CAPS_STOP, .u.s = {"" } },
  30         { RATE, .u.n = {"@W%d", 6, 1, 9, 0, 0, NULL } },
  31         { PITCH, .u.n = {"@F%x", 10, 0, 15, 0, 0, NULL } },
  32         { VOL, .u.n = {"@A%x", 10, 0, 15, 0, 0, NULL } },
  33         { VOICE, .u.n = {"@V%d", 1, 1, 6, 0, 0, NULL } },
  34         { LANG, .u.n = {"@=%d,", 1, 1, 4, 0, 0, NULL } },
  35         { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
  36         V_LAST_VAR
  37 };
  38
  39 /*
  40  * These attributes will appear in /sys/accessibility/speakup/apollo.
  41  */
  42 static struct kobj_attribute caps_start_attribute =
  43         __ATTR(caps_start, 0644, spk_var_show, spk_var_store);
  44 static struct kobj_attribute caps_stop_attribute =
  45         __ATTR(caps_stop, 0644, spk_var_show, spk_var_store);
  46 static struct kobj_attribute lang_attribute =
  47         __ATTR(lang, 0644, spk_var_show, spk_var_store);
  48 static struct kobj_attribute pitch_attribute =
  49         __ATTR(pitch, 0644, spk_var_show, spk_var_store);
  50 static struct kobj_attribute rate_attribute =
  51         __ATTR(rate, 0644, spk_var_show, spk_var_store);
  52 static struct kobj_attribute voice_attribute =
  53         __ATTR(voice, 0644, spk_var_show, spk_var_store);
  54 static struct kobj_attribute vol_attribute =
  55         __ATTR(vol, 0644, spk_var_show, spk_var_store);
  56
  57 static struct kobj_attribute delay_time_attribute =
  58         __ATTR(delay_time, 0644, spk_var_show, spk_var_store);
  59 static struct kobj_attribute direct_attribute =
  60         __ATTR(direct, 0644, spk_var_show, spk_var_store);
  61 static struct kobj_attribute full_time_attribute =
  62         __ATTR(full_time, 0644, spk_var_show, spk_var_store);
  63 static struct kobj_attribute jiffy_delta_attribute =
  64         __ATTR(jiffy_delta, 0644, spk_var_show, spk_var_store);
  65 static struct kobj_attribute trigger_time_attribute =
  66         __ATTR(trigger_time, 0644, spk_var_show, spk_var_store);
  67
  68 /*
  69  * Create a group of attributes so that we can create and destroy them all
  70  * at once.
  71  */
  72 static struct attribute *synth_attrs[] = {
  73         &caps_start_attribute.attr,
  74         &caps_stop_attribute.attr,
  75         &lang_attribute.attr,
  76         &pitch_attribute.attr,
  77         &rate_attribute.attr,
  78         &voice_attribute.attr,
  79         &vol_attribute.attr,
  80         &delay_time_attribute.attr,
  81         &direct_attribute.attr,
  82         &full_time_attribute.attr,
  83         &jiffy_delta_attribute.attr,
  84         &trigger_time_attribute.attr,
  85         NULL,   /* need to NULL terminate the list of attributes */
  86 };
  87
  88 static struct spk_synth synth_apollo = {
  89         .name = "apollo",
  90         .version = DRV_VERSION,
  91         .long_name = "Apollo",
  92         .init = "@R3@D0@K1\r",
  93         .procspeech = PROCSPEECH,
  94         .clear = SYNTH_CLEAR,
  95         .delay = 500,
  96         .trigger = 50,
  97         .jiffies = 50,
  98         .full = 40000,
  99         .dev_name = SYNTH_DEFAULT_DEV,
 100         .startup = SYNTH_START,
 101         .checkval = SYNTH_CHECK,
 102         .vars = vars,
 103         .io_ops = &spk_ttyio_ops,
 104         .probe = spk_ttyio_synth_probe,
 105         .release = spk_ttyio_release,
 106         .synth_immediate = spk_ttyio_synth_immediate,
 107         .catch_up = do_catch_up,
 108         .flush = spk_synth_flush,
 109         .is_alive = spk_synth_is_alive_restart,
 110         .synth_adjust = NULL,
 111         .read_buff_add = NULL,
 112         .get_index = NULL,
 113         .indexing = {
 114                 .command = NULL,
 115                 .lowindex = 0,
 116                 .highindex = 0,
 117                 .currindex = 0,
 118         },
 119         .attributes = {
 120                 .attrs = synth_attrs,
 121                 .name = "apollo",
 122         },
 123 };
 124
 125 static void do_catch_up(struct spk_synth *synth)
 126 {
 127         u_char ch;
 128         unsigned long flags;
 129         unsigned long jiff_max;
 130         struct var_t *jiffy_delta;
 131         struct var_t *delay_time;
 132         struct var_t *full_time;
 133         int full_time_val = 0;
 134         int delay_time_val = 0;
 135         int jiffy_delta_val = 0;
 136
 137         jiffy_delta = spk_get_var(JIFFY);
 138         delay_time = spk_get_var(DELAY);
 139         full_time = spk_get_var(FULL);
 140         spin_lock_irqsave(&speakup_info.spinlock, flags);
 141         jiffy_delta_val = jiffy_delta->u.n.value;
 142         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 143         jiff_max = jiffies + jiffy_delta_val;
 144
 145         while (!kthread_should_stop()) {
 146                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 147                 jiffy_delta_val = jiffy_delta->u.n.value;
 148                 full_time_val = full_time->u.n.value;
 149                 delay_time_val = delay_time->u.n.value;
 150                 if (speakup_info.flushing) {
 151                         speakup_info.flushing = 0;
 152                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 153                         synth->flush(synth);
 154                         continue;
 155                 }
 156                 synth_buffer_skip_nonlatin1();
 157                 if (synth_buffer_empty()) {
 158                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 159                         break;
 160                 }
 161                 ch = synth_buffer_peek();
 162                 set_current_state(TASK_INTERRUPTIBLE);
 163                 full_time_val = full_time->u.n.value;
 164                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 165                 if (!synth->io_ops->synth_out(synth, ch)) {
 166                         synth->io_ops->tiocmset(0, UART_MCR_RTS);
 167                         synth->io_ops->tiocmset(UART_MCR_RTS, 0);
 168                         schedule_timeout(msecs_to_jiffies(full_time_val));
 169                         continue;
 170                 }
 171                 if (time_after_eq(jiffies, jiff_max) && (ch == SPACE)) {
 172                         spin_lock_irqsave(&speakup_info.spinlock, flags);
 173                         jiffy_delta_val = jiffy_delta->u.n.value;
 174                         full_time_val = full_time->u.n.value;
 175                         delay_time_val = delay_time->u.n.value;
 176                         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 177                         if (synth->io_ops->synth_out(synth, synth->procspeech))
 178                                 schedule_timeout(msecs_to_jiffies
 179                                                  (delay_time_val));
 180                         else
 181                                 schedule_timeout(msecs_to_jiffies
 182                                                  (full_time_val));
 183                         jiff_max = jiffies + jiffy_delta_val;
 184                 }
 185                 set_current_state(TASK_RUNNING);
 186                 spin_lock_irqsave(&speakup_info.spinlock, flags);
 187                 synth_buffer_getc();
 188                 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 189         }
 190         synth->io_ops->synth_out(synth, PROCSPEECH);
 191 }
 192
 193 module_param_named(ser, synth_apollo.ser, int, 0444);
 194 module_param_named(dev, synth_apollo.dev_name, charp, 0444);
 195 module_param_named(start, synth_apollo.startup, short, 0444);
 196
 197 MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based).");
 198 MODULE_PARM_DESC(dev, "Set the device e.g. ttyUSB0, for the synthesizer.");
 199 MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
 200
 201 module_spk_synth(synth_apollo);
 202
 203 MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
 204 MODULE_AUTHOR("David Borowski");
 205 MODULE_DESCRIPTION("Speakup support for Apollo II synthesizer");
 206 MODULE_LICENSE("GPL");
 207 MODULE_VERSION(DRV_VERSION);
 208